Thanks for the recommendations! I can't remember how much of Rit whitener I used but I believe it was a whole pack. I then looked at the box and realized I used waaaaay more than you would in a typical laundry load. I mixed it in a 5 gallon bucket with water and soaked the cheesecloth for 10 minutes. The fumes ffrom the Rit were surprisingly pungent. I then rinsed the cheesecloth then threw it in the dryer.